Que- Super cooling stands for cooling of a liquid :
a. At freezing point
b. Below freezing point
c. At melting point
d. Above melting point
Answer- Below freezing point
Que- The spring constant of a spring depends on its
a. Length only
b. Material only
c. Length and its diameter
d. Thickness, its diameter and its material
Answer- Thickness, its diameter and its material
Que- The average kinetic energy of the molecules of an ideal gas is directly proportional to
a. Velocity of Molecules
b. Mass of Molecules
c. Absolute temperature of the gas
d. Temperature of environment
Answer- Absolute temperature of the gas
Que- Steel is more elastic than rubber because it :
a. Requires larger deforming force
b. Is never deformed
c. Is deformed very easily
d. Is harder than rubber
Answer- Is deformed very easily
Que- Water will not be vapourised if
a. The temperature is 0°C
b. The humidity is 0%
c. The humidity is 100%
d. The temperature is 100°C
Answer- The humidity is 100%
Que- Relative humidity is expressed as
a. Grams
b. Kilograms
c. Percentage
d. Ratio
Answer- Percentage
Que- According to special theory of relativity the mass of a particle
a. Increases with increase in velocity with respect to an observer.
b. Decreases with increase in velocity.
c. Decreases with decrease in velocity.
d. Is independent of its velocity.
Answer- Increases with increase in velocity with respect to an observer.
Que- Bolometer is used to measure
a. Frequency
b. Temperature
c. Velocity
d. Wavelength
Answer- Temperature
Que- Boyle's law relates to
a. Kinetic Theory of Gases
b. Viscosity of Liquids
c. Elasticity of Solids
d. Plasticity of Solids
Answer- Kinetic Theory of Gases
Que- Absolute Zero is defined as
a. The temperature at which all molecular motion ceases
b. At which water boils at 298K
c. At which liquid Helium boils
d. At which the volume becomes zero
Answer- The temperature at which all molecular motion ceases
Que- At what temperature (in degree Celsius), the numerical values on Celsius and Fahrenheit scales become equal?
a. –40
b. 40
c. 273
d. –273
Answer- –40
Que- At what temperature (in Fahrenheit) pure water freezes?
a. 32
b. 0
c. 48
d. 37
Answer- 32
Que- On the Kelvin scale, the melting point of ice is
a. 373K
b. 100K
c. 273K
d. 0 K
Answer- 273K
Que- The temperature which has the same reading on both Fahrenheit and Celsius scales is
a. 40°
b. –40°
c. 0°
d. 32°
Answer- –40°
Que- 'Farad' is the unit of :
a. Capacitance
b. Inductance
c. Resistance
d. Conductance
Answer- Capacitance
Que- Which of the following have the same unit ?
a. Work and power
b. Torque and moment of inertia
c. Work and torque
d. Torque and angular momentum
Answer- Work and torque
Que- Kilohertz is a unit which measures
a. Electromagnetic radio wave frequencies
b. Electric resistance
c. Power used by a current of one ampere
d. Voltage
Answer- Electromagnetic radio wave frequencies
Que- What is the unit of the physical quantity "Inductance"?
a. Weber
b. Farad
c. Henry
d. Tesla
Answer- Henry
Que- Pycnometer is an instrument used to measure the
a. Density
b. Intensity of solar radiation
c. Intensity of earthquake
d. High temperatures
Answer- Density
Que- Ohm's law is valid in case of
a. Semiconductor
b. Conductor
c. Superconductor
d. Insulator
Answer- Conductor
Que- Electrical burns occur principally because of
a. Radiation pulses of the electricity
b. The heat generated by the flow of electrical current through the body
c. The high energy of electrons
d. All of the above
Answer- The heat generated by the flow of electrical current through the body
Que- The SI unit of resistance is:
a. Newton
b. Coulomb
c. Ohm
d. Joule
Answer- Ohm
Que- Electrical Energy is the energy of
a. Protons
b. Neutrons
c. Electrons
d. All the above
Answer- Electrons
Que- As water is cooled from 4 deg C to 0 deg C, its density
a. Increases
b. Decreases
c. Remains same
d. None of the above
Answer- Decreases
Que- Sound waves in air are
a. transverse
b. longitudinal
c. electromagnetic
d. polarised
Answer- longitudinal
Que- Magnetism at the centre of a bar magnet is
a. minimum
b. maximum
c. zero
d. minimum or maximum
Answer- zero
Que- It is more difficult to walk on a sandy road than on a concrete road because
a. sand is soft and concreter is hard.
b. the friction between sand and feet is less than that between concrete and feet.
c. the friction between sand and feet is more than that between concrete and feet.
d. the sand is grainy but concrete is smooth.
Answer- the friction between sand and feet is less than that between concrete and feet.
Que- Of the following properties of a wave, the one that is independent of the other is its
a. amplitude
b. velocity
c. wavelength
d. frequency
Answer- amplitude
Que- A car parked in the sun with its windows closed gets terribly hot inside. This is due to
a. The heat emitted by the engine
b. The greenhouse effect
c. The good conducting power of the metal body
d. The double layered wind shield
Answer- The greenhouse effect
Que- To measure the speed of an approaching car a police officer shines
a. Light waves on it
b. Microwaves on it
c. Radio waves on it
d. Ultra high frequency waves on it
Answer- Radio waves on it
Que- The device used for measuring the wavelength of X-rays is
a. G.M. Counter
b. Cyclotron
c. Bragg Spectrometer
d. Mass Spectrometer
Answer- Bragg Spectrometer
Que- If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?
a. LUV < lIR < lVIS
b. LUV > lVIS > lIR
c. LUV > lIR > lVIS
d. LUV < lVIS < lIR
Answer- LUV < lVIS < lIR
Que- Transition ions absorb light in :
a. Infrared region
b. Ultraviolet region
c. Microwave region
d. Visible region
Answer- Visible region
Que- Pure water is bad conductor of electricity because it is
a. Feebly ionized
b. Not volatile
c. A very good solvent
d. A non-polar solvent
Answer- Feebly ionized
Que- The metal whose electrical conductivity is more, is
a. Copper
b. Aluminium
c. Silver
d. Lead
Answer- Silver
Que- Which of the following is a conductor of electricity ?
a. Rubber
b. Pure water
c. Salt water
d. Benzene
Answer- Salt water
Que- A bird sitting on a high tension electric wire does not get electrocuted because
a. It has high resistance
b. The body is earthed
c. It does not form a closed path for the flow of current
d. Its feet are good insulators
Answer- It does not form a closed path for the flow of current
Que- The fuse in our domestic electric circuit melts when there is a high rise in
a. Inductance
b. Current
c. Resistance
d. Capacitance
Answer- Current
Que- Which compressor is usually used in AC?
a. Centrifugal
b. Rotary
c. Reciprocating
d. Axial
Answer- Reciprocating
Que- The best material for the core of a transformer is
a. Stainless steel
b. Mild steel
c. Hard steel
d. Soft iron
Answer- Soft iron
Que- A transformer works on the principle of
a. Self induction
b. Mutual induction
c. Generator
d. Inverter
Answer- Mutual induction
Que- Transformer is a device to convert
a. D.C. to A.C.
b. Low voltage D.C. into high voltage D.C.
c. Low voltage A.C. into high voltage A.C.
d. Mechanical energy into Electrical energy
Answer- Low voltage A.C. into high voltage A.C.
Que- Atomic hydrogen has a life period of
a. One hour
b. One day
c. One minute
d. A fraction of a second
Answer- A fraction of a second
Que- If cream is removed from milk, its density
a. Increases
b. Decreases
c. Remains the same
d. May increase or decrease
Answer- Increases
Que- A falling drop of rain water acquires the spherical shape due to
a. Viscosity
b. Surface Tension
c. Atmospheric pressure
d. Gravitational force
Answer- Surface Tension
Que- Why the needle of iron swims on water surface when it is kept gently ?
a. It will remain under the water, when it will displace more water than its weight
b. The density of needle is less than that of water
c. Due to surface tension
d. Due to its shape
Answer- Due to surface tension
Que- Rise of oil a wick is due to
a. Density of the oil
b. Viscosity of the oil
c. Surface tension of the oil
d. Pressure of the oil
Answer- Surface tension of the oil
Que- Bubbles of air rise up through liquids due to
a. Surface tension and adherence
b. Viscosity and buoyancy
c. Air current over the liquid and buoyancy
d. Up thrust and surface tension
Answer- Viscosity and buoyancy
Que- What is refractive index ?
a. It is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
b. It is defined as the product of speed of light in medium and in vacuum.
c. It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
d. None of above
Answer- It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
Que- A star appears twinkling in the sky because of
a. Scattering of light by atmosphere
b. Reflection of light by atmosphere
c. Refraction of light by atmosphere
d. Diffraction of light by atmosphere
Answer- Refraction of light by atmosphere
Que- What type of lens is used in a magnifying glass
a. Concave
b. Plano-concave
c. Convex
d. None of the above
Answer- Convex
Que- Time of exposure required for taking photograph of an object depends upon the
a. Brightness of the object
b. Skill of photographer
c. Proximity of object
d. Size of the object
Answer- Brightness of the object
Que- A concave lens always forms
a. A real image
b. A virtual image
c. An image type which depends on object characteristics
d. An image type which depends on lens curvature
Answer- A virtual image
Que- The density of water is 1 g/c. This is strictly valid at
a. 0°C
b. 4°C
c. 25°C
d. 100°C
Answer- 4°C
Que- Specific gravity is defined as the ratio of
a. Density of the substance to the density of water
b. Density of the substance to the density of water at 0°C
c. Density of water at 4°C to the density of the substance
d. Density of the substance to the density of water at 4°C
Answer- Density of the substance to the density of water
Que- The cause for the Tsunami, as deduced by the seismologists, is
a. Gravitational pull of the moon
b. Low pressure trough in the ocean
c. Deformation of sea floor and vertical displacement of water
d. Sudden change in the monsoon wind
Answer- Deformation of sea floor and vertical displacement of water
Que- Which statement best describes an igneous intrusion?
a. Igneous intrusion for when ice crystals splash into lava
b. Magma is injected into surrounding rock forming an igneous intrusive
c. Magma is exported to an open area and forms iron
d. Magma explodes to the surface and forms a smooth outer layer of rock
Answer- Magma is injected into surrounding rock forming an igneous intrusive
Que- Which is a common first indicator of an approaching thunderstorm?
a. Too hot
b. Heavy wind
c. A buildup of dark clouds
d. Lightning
Answer- A buildup of dark clouds
Que- Necessary element of change in solar energy to electrical energy
a. Berillium
b. Silicon
c. Tantelum
d. Pure Copper
Answer- Silicon
Que- In hydro power station, the motion produced in turbines is due to
a. Flow of water
b. Burning of coal
c. Burning of diesel
d. Production of steam
Answer- Flow of water
Que- The SI unit for measuring work and energy is
a. Joule
b. Watt
c. Farad
d. Ohm
Answer- Joule
Que- In a rechargeable cell what kind of energy is stored within the cell?
a. Electrical energy
b. Potential energy
c. Chemical energy
d. Kinetic energy
Answer- Chemical energy
Que- A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is
a. Zero
b. One
c. Less than one
d. More than one
Answer- Zero
Que- The ''four stroke petrol engine' is based on
a. Carnot-cycle
b. Otto-cycle
c. Diesel-cycle
d. Boyle's-cycle
Answer- Otto-cycle
Que- The spring balance works on the principle of ________ .
a. Boyle's Law
b. Hooke's Law
c. Bernoulli's principle
d. Pascal's Law
Answer- Hooke's Law
Que- A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ?
a. Increase
b. Dacrease
c. Remain constant
d. Will increase first and then dcrease
Answer- Increase
Que- Air is said to be saturated when
a. Its pressure is minimum
b. It contains the maximum content of water vapour
c. Its thickness is maximum
d. It blows over the barren land
Answer- It contains the maximum content of water vapour
Que- At constant pressure, the volume of a fixed mass of a gas is directly proportional to its absolute temperature. It is the statement of
a. Boyle's Law
b. Charle's Law
c. Gay-Lussac's Law
d. Avogadro's Law
Answer- Charle's Law
Que- During hot weather, the fan produces a feeling of comfort. This is because
a. Fan supplies cool air
b. Fan cools the air
c. Our perspiration eva-porates rapidly
d. Conductivity of air increases
Answer- Our perspiration eva-porates rapidly
Que- The flow of thermal energy is called
a. Heat
b. Current
c. Voltage
d. Potential
Answer- Heat
Que- On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :
a. Metals have higher thermal capacity than plastics
b. Plastics have a lower density than metals
c. Metals are good conductors of heat
d. Plastics have a higher thermal conductivity than metals
Answer- Metals are good conductors of heat
Que- Which of the following is an insulator?
a. Mercury
b. Carbon
c. Germanium
d. Glass
Answer- Glass
Que- 'Therm' is the unit of
a. Power
b. Heat
c. Light
d. Distance
Answer- Heat
Que- What is the minimum escape velocity of rocket to be launched into space ?
a. 5 Km/Sec.
b. 6 Km/Sec.
c. 11 Km/Sec.
d. 15 Km/Sec.
Answer- 11 Km/Sec.
Que- The period of revolution of a geostationary satellite is
a. 365 days
b. 30 days
c. 24 hours
d. Changing continuously
Answer- 24 hours
Que- The laws which govern the motion of planets are called ________
a. Newton's Laws
b. Kepler's Laws
c. Avogadro's laws
d. De Morgan's Laws
Answer- Kepler's Laws
Que- Who gave the Theory of Relativity?
a. Isaac Newton
b. Archimedes
c. Albert Einstein
d. Galileo Galilei
Answer- Albert Einstein
Que- Which of the following was the first theory of superconductivity?
a. Ginzburg Landau theory
b. London theory
c. Resonating valence bond theory
d. Quantum field theory
Answer- London theory
Que- A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be
a. P
b. < P
c. > P
d. 2P
Answer- > P
Que- A wire carrying current is
a. Positively charged
b. Negatively charged
c. Neutral
d. Charged with a type depending upon current strength
Answer- Neutral
Que- Carbon Arc lamps are commonly used in
a. Cinema projectors
b. Photography
c. Vehicles
d. Domestic lighting
Answer- Cinema projectors
Que- A gas thermometer is more sensitive than a liquid thermometer because a gas :
a. Is lighter than liquid
b. Expands more than a liquid
c. Is easy to obtain
d. Does not change state easily
Answer- Expands more than a liquid
Que- What is the SI unit of temperature?
a. Kelvin
b. Joule
c. Celsius
d. Fahrenheit
Answer- Kelvin
Que- Earliest thermometer was developed by
a. Celsius
b. Fahrenheit
c. Kelvin
d. Galileo
Answer- Galileo
Que- The absolute zero is a temperature at which ________
a. Molecular motion in a gas would cease
b. Water freezes
c. All gases become liquid
d. All gases become solid
Answer- Molecular motion in a gas would cease
Que- Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be
a. At a higher level in water
b. At a higher level in alcohol
c. At the same level in both
d. Floating in alcohol and sinking in water
Answer- At a higher level in water
Que- Which of the following characteristics of light remains unchanged when light travels from vaccum enters water?
a. Speed
b. Amplitude
c. Frequency
d. Wavelength
Answer- Frequency
Que- To resolve an object in an electron microscope,
a. The wavelength of the electrons must be close to the diameter of the object
b. The wavelength of the electrons must be greater than the diameter of the object.
c. Both A & B
d. None of the above
Answer- The wavelength of the electrons must be close to the diameter of the object
Que- Which of the following is an example of continous emission spectrum?
a. Spectrum of an oil frame
b. Spectrum of a water
c. Both
d. None
Answer- Spectrum of an oil frame
Que- The atmospheric layer reflecting radio waves is called
a. Ozonosphere
b. Ionosphere
c. Stratosphere
d. Mesosphere
Answer- Ionosphere
Que- For a ray of light to suffer total internal reflection it has to pass from :
a. Glass to water
b. Water to glass
c. Air to water
d. Air to glass
Answer- Air to water
Que- Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
a. The heating effect of current alone
b. Hysteresis loss alone
c. Both the heating effect of current and hysteresis loss
d. Intense sunlight at noon
Answer- Both the heating effect of current and hysteresis loss
Que- Nuclear sizes are expressed in a unit named
a. Fermi
b. Angstrom
c. Newton
d. Tesla
Answer- Fermi
Que- Light year is a unit of
a. Time
b. Distance
c. Light
d. Intensity of light
Answer- Distance
Que- Mirage is due to:
a. Unequal heating of different parts of the atmosphere
b. Magnetic disturbances in the atmosphere
c. Depletion of ozone layer in the atmosphere
d. Equal heating of different parts of the atmosphere
Answer- Unequal heating of different parts of the atmosphere
Que- Light from the Sun reaches us in nearly
a. 2 minutes
b. 4 minutes
c. 8 minutes
d. 16 minutes
Answer- 8 minutes
Que- A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
a. Greater than the weight of the man
b. Less than the weight of the man
c. Same as the weight of the man
d. Zero
Answer- Greater than the weight of the man
Que- Who defined the law of gravitation ?
a. Newton
b. Archimedes
c. Galileo
d. Faraday
Answer- Newton
Que- It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?
a. Law of inertia
b. Newton's second law
c. Newton's third law
d. Pascal's law
Answer- Newton's third law
Que- In the Earth, the weight of a body is maximum at the
a. North Pole
b. South Pole
c. Equator
d. Surface
Answer- Surface